Email Attachments to be Blocked

 

This is a list of executable file extensions, macro files or registry settings files under Windows.  Files with these extensions could contain viruses or instructions to perform undesirable actions on a computer, and therefore should be blocked when attached to an email.  Very few users have a need to exchange files with these extensions via email.

 

This list purposely does not contain DOC, WPD, WKS, and XLS files, as most offices have a legitimate need to exchange files with these extensions.  However, these files could contain macro type viruses and users must still be careful.  RTF, ASC, CSV and TXT files are just plain text files, and by themselves are usually harmless.

 

Files with a ZIP extension are a common way to mail large files or multiple files between users, and could contain files with any of the extensions below.  Users must know the source and contents of the ZIP file before extracting the contents onto their hard drives.

 

Blocking these files does not eliminate the need to run all email through a reputable anti-virus program.  All users should run either server based or workstation based anti-virus programs, using the latest virus signature files.

 

Files with the following extension should be blocked when attached to email:

 

 

 

 

 

This document is meant to be a guide to assist users in controlling the volatile virus problem.  Information Technology Solutions does not guarantee any solution will totally control computer viruses, and cannot be held responsible for any virus damage.  It is the users responsibility to select the right product and keep that product updated to gain the most protection.

BAS 

Basic Programs

SHB 

Document Shortcut

BAT 

Win 9x Batch Files

SCF

Windows Explorer Command File

CMD 

 Win NT Batch Files

SCR 

Screen Saver Files

COM 

Executable Files

SHS 

Scrap Object

DOT 

Microsoft Word Template Files

VBE 

VBScript Encoded

EXE

Executable Files

VBS 

VBScript File

HTA

Hyper Text Application

WS

Windows Script Files

JS

JScript

WSC 

Windows Script Component File

JSE

JScript Encoded

WSF 

Windows Script File

PIF

Program Information File

WSH

Windows Script Hosting Files

REG 

Registry Entries

XLM

Microsoft Excel Macro Files